Tuesday, December 28, 2010
Shut Up Sarah Palin
Time for Revenge
Say Tweet Again
Jules is trying, Ringo. He's trying real hard to be the shepherd. But this whole Twitter-lution thing is really getting to him. All this talk of "tweeple" and "twiggits" and "tweekends" is unfamiliar to him. It makes him nervous. And when he gets nervous, he gets scared. And when he gets scared... that's when mother 'effers accidentally get shot.
But he's really twying-- Oh, damn, you hear that? Now you made him twalk like a jerk. There it is again! That's the last straw!
Go ahead, say "tweet" again! He dares you. No, he double dares you -- say "tweet" one more time! Because the truth is, you're the tweak and he's thetwyranny of evil-- Argh!!! "
All pics from Headline Shirts
Friday, December 24, 2010
Subtitled "A legendary problem and the battle over who solved it," the article concentrates on the human drama of the story, especially the discussion on who contributed how much to the proof of the Poincaré conjecture. Interwoven with the article is an interview with the reclusive mathematician Grigori Perelman, whom the authors tracked down to the St. Petersburg apartment he shares with his mother, as well as interviews with many mathematicians. The article describes Perelman's disillusionment and withdrawal from the mathematical community and paints an unflattering portrait of the 1982 Fields Medalist, Shing-Tung Yau.
The article was selected for inclusion in the book The Best American Science Writing 2007. Sylvia Nasar is best known for her biography of John Forbes Nash, A Beautiful Mind. David Gruber is a PhD recipient and graduate of Columbia University Graduate School of Journalism, who also wrote Aglow in the Dark, published by Harvard University Press.
SummaryThe article begins on the evening of June 20, 2006, with a description of Yau lecturing on a paper by his students, Huai-Dong Cao and Xi-Ping Zhu, in Beijing, on the occasion of Strings 2006, an international conference on string theory. That paper described their effort to verify Perelman's proof. Zhu and Cao were one of the three teams that had undertaken this task.
The article then moves on to an interview with the reclusive mathematician Grigori Perelman. The interview touches on the Fields Medal, Perelman's life prior to his proof of the Poincaré Conjecture, Richard Hamilton's formulation of a strategy to prove the conjecture, and William Thurston's geometrization conjecture. Yau's long collaborative friendship with Hamilton, which started after Yau learned of the latter's work on the Ricci flow, is also mentioned.
Subsequently, the article describes Yau in relation to the late Shiing-Shen Chern, his PhD advisor and the acknowledged top Chinese mathematician, as well as Yau's activities in the Chinese mathematical community. Nasar and Gruber write, "he was increasingly anxious ... [that] a younger scholar could try to supplant him as Chern's heir."
Interweaving comments from many mathematicians, the authors present a complex narrative that touches upon matters peripheral to the Poincaré conjecture but reflective of politics in the field of mathematics:
- Yau's supposed involvement in the controversy surrounding Alexander Givental's proof of a conjecture in the mathematics of mirror symmetry.
- his alleged attempt (which he denied, according to the article) to bring the ICM 2002 to Hong Kong instead of Beijing, and the tussle between him and the Chinese mathematical community that allegedly resulted.
- a conflict in 2005, in which Yau allegedly accused his student Gang Tian (a member of another team verifying Perelman's proof) of plagiarism and poor scholarship while criticizing Peking University in an interview.
On April 13th of this year, the thirty-one mathematicians on the editorial board of the Asian Journal of Mathematics received a brief e-mail from Yau and the journal’s co-editor informing them that they had three days to comment on a paper by Xi-Ping Zhu and Huai-Dong Cao titled “The Hamilton–Perelman Theory of Ricci Flow: The Poincaré and Geometrization Conjectures”, which Yau planned to publish in the journal. The e-mail did not include a copy of the paper, reports from referees, or an abstract. At least one board member asked to see the paper but was told that it was not available.The authors also report that a week after this April email, the title of the paper dramatically changed to "A Complete Proof of the Poincaré and Geometrization Conjecture — Application of the Hamilton–Perelman Theory of The Ricci Flow". (This title was retracted on December 3, 2006.) This alleged incident with the journal has not been confirmed by an outside source; however, no one involved has yet made a statement claiming that it is false.
This paper was the result of the above-mentioned work of Zhu and Cao, which Yau promoted in the Beijing conference. The New Yorker article concludes by linking the alleged actions of Yau with Perelman's withdrawal from the mathematical community, stating that Perelman claimed not to see "what new contribution [Cao and Zhu] did make"; that he had become disillusioned by the lax ethical standards of the community. As for Yau, Perelman is quoted saying, “I can’t say I’m outraged. Other people do worse. Of course, there are many mathematicians who are more or less honest. But almost all of them are conformists. They are more or less honest, but they tolerate those who are not honest”.
The article concludes with a quote from Mikhail Gromov (who earlier in the article compares Perelman's mathematical approach to that of Isaac Newton): “To do great work, you have to have a pure mind. You can think only about the mathematics. Everything else is human weakness. Accepting prizes is showing weakness.” The article is accompanied by a full page cartoon that has garnered controversy, discussed below.
ControversyThe article, and an included full-page color illustration of Yau grabbing the Fields Medal hanging around Perelman's neck, has garnered controversy. It has been the subject of extensive commentaries in blogs. The controversy revolves around its emphasis on Yau's alleged stake in the Poincaré conjecture, its view that Yau was unfairly taking credit away from Perelman, and its depiction of Yau's supposed involvement in past controversies.
On August 22, 2006, Sir John M. Ball, president of the International Mathematical Union, made reference to the article and rushed publication of the Cao/Zhu paper at a speech given at the opening ceremony of the International Congress of Mathematicians.
Mathematics is a profession of high standards and integrity. We freely discuss our work with others, without fear of it being stolen, and research is communicated openly prior to formal publication. Editorial procedures are fair and proper, and work gains its reputation through merit and not by how it is promoted. These are the norms operated by the vast majority of mathematicians. The exceptions are rare, and they are noticed....On September 18, 2006, a few weeks after publication of the article, Yau's attorneys released a letter accusing The New Yorker and the article's authors of defaming Yau. In the letter, the reporters are accused of fabricating quotes and deliberately molding facts into a narrative they knew to be inaccurate. The letter also asks for a public apology from The New Yorker. The letter appeared online on Yau's website, apparently created in response to the controversy.
The New Yorker has issued the following response to the letter:
"’Manifold Destiny,’ a 10,000-word article by Sylvia Nasar and David Gruber published in the August 28, 2006 issue of The New Yorker, is the product of more than four months of thorough, careful reporting and meticulous fact-checking. Ms. Nasar and Mr. Gruber spent over twenty hours interviewing Dr. Yau; they conducted approximately 100 other interviews with people in the field; corresponded by email with Dr. Yau and many others; and traveled to China where they conducted interviews and attended speeches and events discussed in the article. In addition, the magazine’s fact-checkers spoke with Dr. Yau for approximately eight hours, they examined notes, tapes, and documents gathered by the authors, and the checkers conducted their own thorough research. Contrary to Dr. Yau’s assertions, the article is nuanced and fair, and was prepared using ethical standards of journalism. Dr. Yau, his supporters and his point of view were given ample space in the article. We stand by the piece and the journalists." Yau's legal efforts have not progressed beyond his September letter. The New Yorker has stood firmly by its story.
Two of the mathematicians interviewed in The New Yorker article — Stroock and Anderson— have allegedly issued statements in opposition to The New Yorker article, after it became available online. On Oct 6, 2006, the statements attributed to Stroock and Andersen were posted on Yau's website.. It has not been confirmed if these mathematicians actually wrote the statements since they are not posted on their own websites and Stroock's "official" letter in the September 11, 2006 issue of The New Yorker is not critical of the article. However, to date none of these mathematicians has publicly denied writing the letters posted on Yau's website either.
On September 25, 2006, a letter from Richard Hamilton was posted on Yau's website. Hamilton detailed a personal account of the history of the Ricci flow approach to the Poincaré conjecture, saying he was very disturbed by the unfair manner in which Yau had been portrayed in The New Yorker article.
As of October 16, 2006, eight mathematicians in total have posted letters expressing support for Yau on his web site.
On October 17, 2006, a profile of Yau in the New York Times devoted about half its length to the Perelman dispute. The article said that Yau's promotion of the Cao–Zhu paper "annoyed many mathematicians, who felt that Dr. Yau had slighted Dr. Perelman," but also presented Yau's position, namely that he had never claimed there were gaps in Perelman’s proof, but merely that it was "not understood by all people", and that he "had a duty to dig out the truth of the proof".
The same New York Times article also noted that it had been discovered that a crucial argument of the Cao–Zhu paper was identical to one from a note by Bruce Kleiner and John Lott posted online in 2003. This led to an erratum being issued by Cao and Zhu in the December 2006 issue of the same journal where the original article had appeared.
On December 22, 2006, Science Magazine honored Perelman's proof (with "missing key details" filled by others) of the Poincaré Conjecture as the scientific "Breakthrough of the Year," the first time this had been bestowed in the area of mathematics.. The article mentioned how Cao and Zhu had copied from Kleiner and Lott and reported that Cao and Zhu "grudgingly printed an erratum acknowledging Kleiner and Lott's priority". The article also quoted Yau as saying of the Poincaré conjecture, "The methods developed … should shed light on many natural systems, such as the Navier-Stokes equation [of fluid dynamics] and the Einstein equation [of general relativity]." It also talks of animosity among mathematicians following this episode where the AMS attempted to have a panel on the Poincaré and geometrization conjectures at its January 2007 meeting in New Orleans, Louisiana. However, this attempt by the organizer John Ewing fell through after Lott refused to share the stage with Zhu.
On December 26, 2006, National Public Radio (NPR) released an account of the Poincaré conjecture and the controversy surrounding The New Yorker article. David Kestenbaum, a former Harvard Physics graduate student, reported on the story. In his interview, Yau called Perelman’s work “truly original and genius”, and the New Yorker article as inaccurate, denying having given a quote concerning credit contributions at a specific press conference referenced by the New Yorker. He did not directly answer if he had ever made such a statement. "NPR translated an audiotape provided by Yau" and their analysis was in agreement with Yau's statements. Sylvia Nasar was said to have declined multiple attempts for interview by NPR.
Revision of the Cao–Zhu articleAfter the similarity with the argument by Kleiner and Lott had been pointed out, Cao and Zhu published an erratum that appeared in the November 2006 issue of the Asian Journal of Mathematics, confirming that the material was by Kleiner and Lott, stating that its uncredited appearance in the Cao–Zhu paper was due to an oversight, and apologizing for failing to properly attribute the copied argument. In the same issue, the AJM editorial board issued an apology for what it called "incautions" in the Cao–Zhu paper.
On December 3, 2006, Cao and Zhu retracted the original version of their paper, which was titled “A Complete Proof of the Poincaré and Geometrization Conjectures — Application of the Hamilton–Perelman Theory of the Ricci Flow” and posted a revised version, renamed, more modestly, "Hamilton–Perelman's Proof of the Poincaré Conjecture and the Geometrization Conjecture". Rather than the claim of the original abstract, "we give a complete proof", suggesting the proof is by the authors, the revised abstract states: "we give a detailed exposition of a complete proof". The authors also took out the phrase "crowning achievement" from the abstract.
- ^ a b Sylvia Nasar and David Gruber. "Manifold Destiny: A legendary problem and the battle over who solved it", The New Yorker, August 21, 2006. (The title is a word play on "Manifest Destiny".)
- ^ a b Cao, Huai-Dong; Zhu, Xi-Ping (2006). "A complete proof of the Poincaré and geometrization conjectures — application of the Hamilton–Perelman theory of the Ricci flow". Asian Journal of Mathematics 10 (2): 165–492. MR2233789. http://www.intlpress.com/AJM/AJM-v10.php#AJM-10-2.
- ^ The Strings 2006 website
- ^ See, however, Award Loses a Hero, Kommersant, 23 August 2006. Retrieved on 2006-08-29.
- ^ See, for example, Chinese work on solving Poincare Conjecture recognized, China View (Xinhua), 21 Jun 2006. Retrieved on 2006-08-29.
- ^ http://www.ams.org/notices/200611/comm-icm.pdf
- ^ "Math prof says New Yorker defamed him", Boston Herald, 20 Sept 2006
- ^ Letter to New Yorker, from Yau's attorneys Todd & Weld LLP
- ^ "New Yorker: Math prof’s charges don’t add up", Boston Herald, 20 Sept 2006
- ^ Stroock's statement
- ^ Andersen's statement
- ^ "Richard S. Hamilton's Letter to Yau Shing-Tung' Attorney" a letter
- ^ Testimonials on Shing-Tung Yau's web site http://www.doctoryau.com/
- ^ Overbye, Dennis (17 October 2006). "Shing-tung Yau: The Emperor of Math". New York Times. http://www.nytimes.com/2006/10/17/science/17yau.html. Retrieved May 12, 2010.
- ^ This discovery is sometimes attributed to Sujit Nair, then a postdoc student at the University of Southern California (e.g. in George G. Szpiro's Poincaré's Prize), but his blog posting announcing the discovery was in fact posted on the day the New York Times article appeared and quotes from that article, and a side-by-side comparison he published later, calling it plagiarism, was described as emailed to him by someone else. The subsequent erratum issued by Cao and Zhu thanks Kleiner and Lott for bringing the issue to their attention.
- ^ a b Cao, Huai-Dong; Zhu, Xi-Ping (2006). "Erratum to “A complete proof of the Poincaré and geometrization conjectures — application of the Hamilton–Perelman theory of the Ricci flow”, Asian J. Math., Vol. 10, No. 2, 165-492, 2006". Asian Journal of Mathematics 10 (4): 663–664. MR2282358. http://www.intlpress.com/AJM/AJM-v10.php#AJM-10-4.
- ^ Mackenzie, Dana (2006-12-22). "The Poincaré Conjecture—Proved". Science (American Association for the Advancement of Science) 314 (5807): 1848–1849. doi:10.1126/science.314.5807.1848. ISSN: 0036-8075. http://www.sciencemag.org/cgi/content/full/314/5807/1848. Retrieved 2006-12-29.
- ^ "Solving an Old Math Problem Nets Award, Trouble". National Public Radio. 26 December 2006. http://www.npr.org/templates/story/story.php?storyId=6682439.
- ^ "NPR interview transript"
- ^ Cao, Huai-Dong and Zhu, Xi-Ping (December 3, 2006). "Hamilton–Perelman's Proof of the Poincaré Conjecture and the Geometrization Conjecture". arXiv.org. http://arxiv.org/abs/math.DG/0612069.
- Letter from Yau's legal counsel, September 18, 2006
- New Yorker response to Yau's letter (mirror)
- Richard S Hamilton' Letter to Yau Shing-Tung' Attorney on September 25, 2006 Richard S Hamilton's letter in response to New Yorker's Article about Yau, etc.
- "Letters to the Editor" in relation to Manifold Destiny in the January 2007 Notices of the AMS
- NPR: Solving an Old Math Problem Nets Award, Trouble
Friday, December 17, 2010
Still, I've seen this new brand on the road lately, and it looks sweet. So I would if I could but I can't so I won't. Midlife crisis, much?
I look at it this way: If any person deserved to own a Stradivarius violin, it was Albert Einstein. But he probably didn't. He made due with what he had, and did OK I've heard.
Wednesday, November 17, 2010
|Feigenbaum Constant Approximations|
A curious approximation to the Feigenbaum constant is given by
M. Trott (pers. comm., May 6, 2008) noted
where is Gauss's constant, which is good to 4 decimal digits, and
where is the tetranacci constant, which is good to 3 decimal digits.
A strange approximation good to five digits is given by the solution to
where is the Lambert W-function (G. Deppe, pers. comm., Feb. 27, 2003).
gives to 3 digits (S. Plouffe, pers. comm., Apr. 10, 2006).
M. Hudson (pers. comm., Nov. 20, 2004) gave
which are good to 17, 13, and 9 digits respectively.
Stoschek gave the strange approximation
which is good to 9 digits.
R. Phillips (pers. comm., Sept. 14, 2004-Jan. 25, 2005) gave the approximations
which are good to 3, 3, 3, 4, 6, 8, and 8 decimal digits, respectively.
An approximation to due to R. Phillips (pers. comm., Jan. 27, 2005) is obtained by numerically solving
for , where is the golden ratio, which is good to 4 digits.